XmClipboardStartCopy(library call) XmClipboardStartCopy(library call)
NAMEXmClipboardStartCopy — A clipboard function that sets up a storage and
data structure
SYNOPSIS
#include <Xm/CutPaste.h>
int XmClipboardStartCopy (display, window, clip_label,
timestamp, widget, callback, item_id)
Display * display;
Window window;
XmString clip_label;
Time timestamp;
Widget widget;
XmCutPasteProc callback;
long * item_id;
(void)
DESCRIPTIONXmClipboardStartCopy sets up storage and data structures to receive
clipboard data. An application calls this function during a cut or
copy operation. The data item that these structures receive then
becomes the next data item in the clipboard.
Copying a large piece of data to the clipboard can take a long time.
It is possible that, once the data is copied, no application will ever
request that data. The Motif Toolkit provides a mechanism so that an
application does not need to actually pass data to the clipboard until
the data has been requested by some application.
Instead, the application passes format and length information in
XmClipboardCopy to the clipboard functions, along with a widget ID and
a callback function address that is passed in XmClipboardStartCopy. The
widget ID is necessary for communications between the clipboard func‐
tions in the application that owns the data and the clipboard functions
in the application that requests the data.
The callback functions are responsible for copying the actual data to
the clipboard through XmClipboardCopyByName. The callback function is
also called if the data item is removed from the clipboard and the
actual data is no longer needed.
display Specifies a pointer to the Display structure that was
returned in a previous call to XOpenDisplay or XtDisplay.
window Specifies the window ID of a widget that relates the applica‐
tion window to the clipboard. The widget's window ID can be
obtained through XtWindow. The same application instance
should pass the same window ID to each of the clipboard func‐
tions that it calls.
clip_label
Specifies the label to be associated with the data item.
This argument is used to identify the data item, as in a
clipboard viewer. An example of a label is the name of the
application that places the data in the clipboard.
timestamp Specifies the time of the event that triggered the copy. A
valid timestamp must be supplied; it is not sufficient to use
CurrentTime.
widget Specifies the ID of the widget that receives messages
requesting data previously passed by name. This argument must
be present in order to pass data by name. Any valid widget ID
in your application can be used for this purpose and all the
message handling is taken care of by the cut and paste func‐
tions.
callback Specifies the address of the callback function that is called
when the clipboard needs data that was originally passed by
name. This is also the callback to receive the delete message
for items that were originally passed by name. This argument
must be present in order to pass data by name.
item_id Specifies the number assigned to this data item. The appli‐
cation uses this number in calls to XmClipboardCopy, XmClip‐
boardEndCopy, and XmClipboardCancelCopy.
For more information on passing data by name, see XmClipboardCopy(3)
and XmClipboardCopyByName(3).
The widget and callback arguments must be present in order to pass data
by name. The callback format is as follows:
void (*callback) (widget, data_id, private, reason)
Widget widget;
long *data_id;
long *private;
int *reason;
(void)
widget Specifies the ID of the widget passed to this function.
data_id Specifies the identifying number returned by XmClipboardCopy,
which identifies the pass-by-name data.
private Specifies the private information passed to XmClipboardCopy.
reason Specifies the reason. XmCR_CLIPBOARD_DATA_DELETE or
XmCR_CLIPBOARD_DATA_REQUEST are the possible values.
RETURN
XmClipboardSuccess
The function was successful.
XmClipboardLocked
The function failed because the clipboard was locked by
another application. The application can continue to call the
function again with the same parameters until the lock goes
away. This gives the application the opportunity to ask if
the user wants to keep trying or to give up on the operation.
RELATEDXmClipboardCancelCopy(3), XmClipboardCopy(3), XmClipboardCopyByName(3),
XmClipboardEndCopy(3), XmClipboardEndRetrieve(3), XmClipboardInquire‐
Count(3), XmClipboardInquireFormat(3), XmClipboardInquireLength(3),
XmClipboardInquirePendingItems(3), XmClipboardLock(3), XmClipboardReg‐
isterFormat(3), XmClipboardRetrieve(3), XmClipboardStartRetrieve(3),
XmClipboardUndoCopy(3), XmClipboardUnlock(3), and XmClipboardWithdraw‐
Format(3).
XmClipboardStartCopy(library call)
